[INFO] fetching crate fdg-img 0.4.2...
[INFO] testing fdg-img-0.4.2 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate fdg-img 0.4.2 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate fdg-img 0.4.2
[INFO] finished tweaking crates.io crate fdg-img 0.4.2
[INFO] tweaked toml for crates.io crate fdg-img 0.4.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fdg-img 0.4.2 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate fdg-img 0.4.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded const-cstr v0.3.0
[INFO] [stderr]   Downloaded yeslogic-fontconfig-sys v3.2.0
[INFO] [stderr]   Downloaded float-ord v0.2.0
[INFO] [stderr]   Downloaded freetype v0.7.0
[INFO] [stderr]   Downloaded pathfinder_simd v0.5.1
[INFO] [stderr]   Downloaded plotters-bitmap v0.3.2
[INFO] [stderr]   Downloaded pathfinder_geometry v0.5.1
[INFO] [stderr]   Downloaded font-kit v0.11.0
[INFO] [stderr]   Downloaded fdg-sim v0.9.1
[INFO] [stderr]   Downloaded core-text v19.2.0
[INFO] [stderr]   Downloaded dwrote v0.11.0
[INFO] [stderr]   Downloaded glam v0.21.3
[INFO] [stderr]   Downloaded freetype-sys v0.13.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6fb12086afde39f05d1866d2ff5cf3ffaab0d4983c6ca44cfcb894b2d5d0cbb2
[INFO] running `Command { std: "docker" "start" "-a" "6fb12086afde39f05d1866d2ff5cf3ffaab0d4983c6ca44cfcb894b2d5d0cbb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6fb12086afde39f05d1866d2ff5cf3ffaab0d4983c6ca44cfcb894b2d5d0cbb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fb12086afde39f05d1866d2ff5cf3ffaab0d4983c6ca44cfcb894b2d5d0cbb2", kill_on_drop: false }`
[INFO] [stdout] 6fb12086afde39f05d1866d2ff5cf3ffaab0d4983c6ca44cfcb894b2d5d0cbb2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 6a9476551beda85fd5bd7c8bbc4e39ab267a37b20e777dbe6d876fcfa30da6dc
[INFO] running `Command { std: "docker" "start" "-a" "6a9476551beda85fd5bd7c8bbc4e39ab267a37b20e777dbe6d876fcfa30da6dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.59
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling pkg-config v0.3.27
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.86
[INFO] [stderr]    Compiling once_cell v1.17.2
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.59/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling simd-adler32 v0.3.5
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "6a9476551beda85fd5bd7c8bbc4e39ab267a37b20e777dbe6d876fcfa30da6dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a9476551beda85fd5bd7c8bbc4e39ab267a37b20e777dbe6d876fcfa30da6dc", kill_on_drop: false }`
[INFO] [stdout] 6a9476551beda85fd5bd7c8bbc4e39ab267a37b20e777dbe6d876fcfa30da6dc